This question explores JavaScript and addresses practical considerations related to: How can I deep clone an object in JavaScript without using libraries?

To deep clone an object in JavaScript without using libraries, you can use the structuredClone method, which is a built-in function in modern JavaScript. const originalObject = { name: "Alice", details: { age: 30, hobbies: ["reading", "hiking"] } }; const clonedObject = structuredClone(originalObject); console.log(clonedObject); console.log(clonedObject === originalObject); // false console.log(clonedObject.details === originalObject.details); // false ADDITIONAL COMMENT: - The structuredClone method creates a deep copy of the original object, meaning nested objects and arrays are also cloned. - This method is part of the modern JavaScript standard and is supported in most up-to-date environments. - The comparison clonedObject === originalObject returns false, confirming that a new object is created. - Similarly, clonedObject.details === originalObject.details returns false, indicating that nested objects are also independently cloned. ✅

How can I deep clone an object in JavaScript without using libraries?

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How can I deep clone an object in JavaScript without using libraries?

Asked on Mar 25, 2026

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To deep clone an object in JavaScript without using libraries, you can use the structuredClone method, which is a built-in function in modern JavaScript.

<!-- BEGIN COPY / PASTE -->
        const originalObject = {
            name: "Alice",
            details: {
                age: 30,
                hobbies: ["reading", "hiking"]
            }
        };

        const clonedObject = structuredClone(originalObject);

        console.log(clonedObject);
        console.log(clonedObject === originalObject); // false
        console.log(clonedObject.details === originalObject.details); // false
        <!-- END COPY / PASTE -->

Additional Comment:

The structuredClone method creates a deep copy of the original object, meaning nested objects and arrays are also cloned.
This method is part of the modern JavaScript standard and is supported in most up-to-date environments.
The comparison clonedObject === originalObject returns false, confirming that a new object is created.
Similarly, clonedObject.details === originalObject.details returns false, indicating that nested objects are also independently cloned.

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How can I deep clone an object in JavaScript without using libraries?

Asked on Mar 25, 2026

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